Question

我想要做的是当用户为活动提供地点信息时。单击按钮后，它会正确地将数据保存到场地表中，然后转到活动创建的位置。现在，当给出以下信息时，我需要将 venue.id放入活动表。此外，还有另一个来自用户表的外键，名为Activity_Manager_User_SSN。此外键是用户定义的。我需要这两个记录。我的Php知识较少。我怎样才能获得这个场地。想进入活动表。我在android中使用retrofit2

我的数据库中有多个表，如下所示：

CREATE TABLE IF NOT EXISTS `activityplanner_db`.`Activity` (
  `Id` INT NOT NULL,
  `Activity_Name` VARCHAR(45) NOT NULL,
  `Activity_StartDate` DATETIME NOT NULL,
  `Activity_EndDate` DATETIME NOT NULL,
  `Activity_Attachment` VARCHAR(45) NOT NULL,
  `Activity_Capacity` INT NOT NULL,
  `Activity_City` VARCHAR(45) NOT NULL,
  `Activity_Website` VARCHAR(45) NOT NULL,
  `Venue_Id` INT NULL,
  `Activity_Manager_User_SSN` INT NULL,
  PRIMARY KEY (`Id`),
  INDEX `Venue_Id_idx` (`Venue_Id` ASC),
  INDEX `Activity_Manager_User_SSN_idx` (`Activity_Manager_User_SSN` ASC),
  CONSTRAINT `Venue_Id`
    FOREIGN KEY (`Venue_Id`)
    REFERENCES `activityplanner_db`.`Venue` (`Id`)
  CONSTRAINT `Activity_Manager_User_SSN`
    FOREIGN KEY (`Activity_Manager_User_SSN`)
    REFERENCES `activityplanner_db`.`User` (`SSN`)
)
CREATE TABLE IF NOT EXISTS `activityplanner_db`.`Venue` (
  `Id` INT NOT NULL,
  `Venue_Address` VARCHAR(45) NULL,
  `Venue_Name` VARCHAR(45) NULL,
  `Venue_City` VARCHAR(45) NULL,
  PRIMARY KEY (`Id`))

活动也有自动增量.Id和venue.Id。

在我的应用程序中，我使用php发布daha，如下所示：

<?php
require_once ('Connection.php');

    class insertvenue{
    function startInsertvenue()
    {
        $connection = new Connection();
        $conn = $connection->getConnection();
        $response = array();

        $VenueAddress = $_POST['Venue_Address'];
        $VenueName = $_POST['Venue_Name'];
        $VenueCity = $_POST['Venue_City'];

        try{
            if(isset($VenueName)){

                $sqlInsert = "INSERT INTO venue (Venue_Address, Venue_Name, Venue_City) VALUES ('$VenueAddress', '$VenueName', '$VenueCity')";
                $conn -> exec($sqlInsert);
            }
        }catch (PDOException $exception){
            echo "Mekan kaydı yapılamadı".$exception->getMessage();
        }
        if($sqlInsert){
            //success inserted
            $response["success"] = 1;
            $response["message"] = "Venue successful inserted!";
            echo json_encode($response);
        }else{
            //failed inserted
            $response["success"] = 0;
            $response["message"] = "Failed while insert data";
            echo json_encode($response);
    }
}

    }
$insert = new insertvenue();
$insert->startInsertvenue();;

?>

<?php
require_once ('Connection.php');

    class insertactivity{
    function startInsertActivity()
    {
        $connection = new Connection();
        $conn = $connection->getConnection();
        $response = array();

        $ActivityName = $_POST['Activity_Name'];
        $ActivityStartDate = $_POST['Activity_StartDate'];
        $ActivityEndDate = $_POST['Activity_EndDate'];
        $ActivityCapacity = $_POST['Activity_Capacity'];
        $ActivityCity = $_POST['Activity_City'];
        $Venue_Id = $_POST['Venue_Id'];
        try{
            if(isset($ActivityName)){


                $sqlInsert = "INSERT INTO activity (Activity_Name, Activity_StartDate, Activity_EndDate, Activity_Capacity,
                Activity_City, Venude_Id) 
                  VALUES ('$ActivityName','$ActivityStartDate',' $ActivityEndDate', '$ActivityCapacity', 
                  '$ActivityCity', '')";
                $conn -> exec($sqlInsert);
            }
        }catch (PDOException $exception){
            echo "fail".$exception->getMessage();
        }
        if($sqlInsert){
            //success inserted
            $response["success"] = 1;
            $response["message"] = "Activity successful inserted!";
            echo json_encode($response);
        }else{
            //failed inserted
            $response["success"] = 0;
            $response["message"] = "Failed while insert activity";
            echo json_encode($response);
        }
    }
}

$insert = new insertactivity();
$insert->startInsertActivity();;

?>

Answer 1

首先插入场地并获取最后插入的ID：

   $vid =  $conn->lastInsertId();

然后插入包含$ vid的事件作为您的FK。仅当您保持id自动递增时，这才有效。

编辑：将您的功能更改为：

 function startInsertvenue ($activity_Manager_User_SSN, $user_id){
    ........
   }

并在从用户表中查询后调用它，如下所示：

$insert->startInsertActivity($Activity_Manager_User_SSN, $_SESSION['user_id']);

Android Mysql如何使用PHP插入外键

1 个答案: